Changed sbt.properties file to include new runtime variables for profiles sbtx samples
Changes For Dropbox

Replacing single quotes with double quotes
Merge pull request #52 from projsaha/changedSbtProp

Changed sbt.properties file to include new runtime variables for profile...
Merge pull request #53 from ManishKataria/DropboxOauth1Fixes

Changes For Dropbox
Merge pull request #49 from VimalDhupar/HmacEncryptionandCheckStatus

Hmac encryptionand check status
Add new method Endpoint.updateHeaders and use this to add nonce required
by FileService
Merge pull request #54 from markewallace/AddEndpointUpdateHeaders

Add new method Endpoint.updateHeaders and use this to add nonce required by FileService
Hmac Encryption Related Code Review Changes - round 2.